DE1694704B2 - SOLID PARTICLE ADDITIVE PROVIDED WITH A WAXY COATING FOR POLYMERIZES AND PROCESS FOR THE PRODUCTION THEREOF - Google Patents

Description

There are already a number of methods to obtain improved viscosity properties,
borrowed from pigments known. For example, US-35 describes many additives that are commonly used in elastomers and patent specification 16 51 733 a method of making resins, including antioxidant non-dusting carbon pigments, in which the tien, lubricants, anti-blocking agents, pigments with a very thin coating (5 to 10%) fillers, pigments, blowing agents and stabilizers made of wax or a waxy substance can be provided by coating with the above. Many of the mixtures that can be used for this procedure have been improved. Preferred coatings contain waxes that are liquid, such as mineral oil, fish oil and, according to the invention, stearyl alcohol and paraffin wax. Castor oil. The coating substance is dissolved in benzene or emulsified in water and the carbon mix to the substrate before mixing, although this substrate with the solution or dispersion in contact is not critical.

whereupon the applied medium went through 45 in a number of additions including tri-drying Will get removed. That US patent is basic lead sulfate, which is used as a stabilizer for poly but no method of making solid vinyl chloride compositions is particularly suitable Particle additives for polymers with good viscous properties have been found to account for about 10 to 25% of the excess properties refer to. Train compositions is most effective. It is

The US patent specification 20 09 436 describes a 50 possible coating amounts of 5 to 50 risks for the production of non-baking pigments. to be used as a percentage by weight on solid particle substrates This process should be the pigment particles, to their effect and dispersibility in like titanium dioxide, waxed elastomers and resins. The advantages are to have after leakage from the support of such coatings in particular when to ensure easy redispersion. The 55 Plating of Tribasic Lead Sulphate in Hard Coating amounts used are up to 5% of polyvinyl chloride compositions as excellent and are therefore relatively low. This also proved.

Patent specification is not an indication of the production of It has been found that the desired combination

Solid additives with good viscosity properties add to coating properties remove. 60 reliance on the formation of a very fluid melt

In US Pat. No. 3,072,586, a process is based without the polymer composition for the production of wax-coated solids, an excessive lubricity is imparted, particle additives for elastomeric compositions These properties result in a coated product that described. The solid particles coated in this way - which is very fluid in the melt, as well as a maximum Additives have stabilizing properties, but the wettability of the solid additive is 65%. Viscosity release them with regard to their workability, in particular investigations of the various coated solid soil Due to the relatively high melt viscosity of the particle additives, they have ease of use and Coating material, left to be desired. the effectiveness of the resulting products when

^: Bringing Wp »j shown in the polymer matrix. Example ice creams give 5 to 30% alcohol in a paraffin-based coating in bi-part with tribasic lead sulfate

yial alcohol in a g fin base in

suitable temperature range good viscosity

european j _n the coating suitable alcohols, which may be either saturated or unsaturated or even re secondary alcohols -Octylalkob.01, 2-ethylhexanol, isooctyl alcohol, hl Stllkhl Hdtllk

ontanyl alcohol and oleyl alcohol. The fatty alcohols used should not discolour, Cause stains or degradation of the respective polymer. You should also

Agents such as antimony oxide, ultraviolet absorbers such as dibasic lead phosphite, lubricant. Agents that prevent blocking, vulcanizing agents and Accelerator.

The invention also provides a process for the preparation of coated solid particle additives which characterized in that one has a solid particle substrate with a wax which has a melting point

b.01, 2y, yohol, between 50 and 150 ⁰ C, and 5 to 50% of one

Hiryl alcohol, stearyl alcohol, hydroxystearyl alcohol fatty alcohol with 8 to 28 carbon atoms through Montanyl alcohol and oleyl alcohol. Heating and / or mixing treated, and that that

Ftlkhl ll ki Vrfä coated substrate is optionally pulverized.

The individual components of the coating are

cause. You should also preferably do this before coating the solid particle easy to insert and fused to 15 substrate. The coating will m wax not be reactive. then through a heating and / or mixing

The wax component of the coating zits together is applied to the substrate. For this The latter can be natural or synthetic. can be any known mixing or dispersing technique Typical preferred examples are hydrocarbon. After covering it, it can waxes such as paraffin wax, ester waxes such as S permacet-20 product before its introduction into the resin or the wax, mineral waxes such as montan wax, amide waxes, synthetic material. The introduction will i Äthlendistearamid and Äthylenediricinolamid carried out according to the usual methods. Depending on

ability of the particular solid particle substrate and its function correspond to those in the respective »5 quantities of resins to be imported are those in this field usual percentages, taking into account the increased effectiveness of the coated additive will.

According to a preferred embodiment of the melt should never melt at low temperatures

«Have M-proportionally low viscosity. The invention can be a hydrous solid particle sub-Wh can be used individually or in mixtures with simultaneous removal of the water above d d id d coating process

wax, mineral waxes such as montan wax, amide waxes such as ethylene distearamide and ethylene diricinolamide, halogenated hydrocarbon waxes such as chlorinated paraffin waxes and chlorinated naphthalenes and ketone waxes like stearon.

The melting point of the wax, which is in the range from 50 to 150 ^° C., is high enough that the coating Li remains firm and hard at room and storage temperatures. The melt should never have a moderately low viscosity at low temperatures

strat can be withdrawn while removing the wa by using the plating process Performs above the temperature at which the water is removed. .

The coated additives are beneficial in Polymers such as elastomers are used, for example natural and synthetic rubbers, chlorosulfonated polyethylene, ethylene-propylene-co-

d improves the effectiveness of the additive in the resin polymerisatkauUchukarten, ethylene propylene terpolymer. The deposit of the merisate, butyl styrene, butadiene styrene, silicone acrylic pKääLiSXtrat. on metal surfaces in the case of nitrile rubbers and plastics, for example, other processing is significantly reduced. Furthermore, polyvinyl chloride polymers and copolymers, dfe absorption of water or other undesirable polyethylene and copolymers ^ polypropylene, Po- SdSSK or the absorption of ^ vinylidene chloride, PfM,. ^^ Wasse? delayed in previously dehydrated additives. 45 den, polyacetals, acrylic butadiene styrene, poly-The coating of the solid particle carbonates according to the invention, chlorinated polyethylene polymethyl meth-additives also reduces the abrasion of the solid particle acrylate and polyaromatic sulfones.

Can wax

Can be used in quantities.

An important advantage when processing the •. ! X in that in the mill or the mixer the Tnmd'or frictional heat a click of the causes growth coating and thereby promotes the dispersion of the additive within the resin. Dem-S ird the effectiveness of the additive in the resin h id d Abl d

ouch the Gewi *.

such as titanium dioxide, zinc oxide, lead chromate, cadmium-related, sulfide, cadmium selenide, zinc sulfide, white lead, stable

B e i s ρ i e 1 1

a paraffin-based coating by varying the addition of fatty alcohol. Various have been made Amounts of paraffin wax (melting point 50 ° C) and stearyl alcohol are used, with a total coating amount of Ii% on the tribasic lead sulfate was complied with. The paraffin wax and the stearyl alcohol was made by heating in an oven to 125 ° C in the mixing chamber of a high speed mixer melted together. The tribasic lead sulfate was separated in an oven heated to 125 ° C. The coating was then made by the gradual addition of the heated tribasic lead sulfate made into the melted paraffin wax composition with vigorous stirring. The overpowered Products were transferred to 227 g glass containers and the melt viscosities at 125 ° C below

Table I.

Using a Brookfield Viscometer, Model RVF, with a shear rate of 20UpNi certainly.

In the case of the composition which does not contain stearyl alcohol, i. H. 85% tribasic lead sulfate and 15% paraffin Containing wax, the mixture became tribasic after reaching a content of added solid Lead sulfate of about 80% extremely viscous, and due to the high viscosity the mixer motor stopped To prepare this composition, it was necessary to perform the process using a: more powerful, but operating at a slower speed planetary-type mixer

The compositions of the coated products and their melt viscosities at 125 ° C are in dei Table I below.

composition
(7.)

component

Tribasic lead sulfate

Paraffin wax

Stearyl alcohol

85
15th

85

14.5

0.5

Melt viscosity at 125 ^° C., poise
Brookfield viscosity 20 rpm 20,000 405

85
14th
1

75

85
13th
2

85
10
5

30th

85
7.5
7.5

60

85
2.5
12.5

80

85
0

15th

100

These data show the beneficial effect of relatively small amounts of stearyl alcohol on the Melt Viscosity of Coated Tribasic Lead Sulphate.

Example 2

A study was conducted to determine the viscosity properties of tribasic lead sulfate after various paraffin wax-stearyl alcohol coatings were applied. The values were obtained at relatively low temperatures, 75 and 100 ^° C., and at two shear speeds, 4 and 20 rpm. In addition, values were determined for coating compositions at three different proportions of wax / alcohol in the absence of tribasic lead sulfate. The results are shown below.

The data obtained by examining the coatings separately show that the viscosities measured were very low. The lowest viscosities with tribasic lead sulfate were 1 to 2.5 parts Obtained stearyl alcohol.

Table II Parts by weight Example 3 Stearyl alcohol Brookfield Viscosity, Poise 20rpm 100 ⁰ C 20rpm Lead sulfate and Paraffin wax Composition, paraffin 75 ° C 0.1 4rpm 0.1 Tribasic 5 4rpm 0.2 0.1 0.1 10 7.5 0.1 0.2 0.2 0.1 0 7.5 10 0.1 78 0.2 64 0 5 1 0.2 154 200 60 0 14th 2.5 310 290 200 88 85 12.5 5 450 430 300 100 85 10 7.5 700 440 350 380 85 7.5 10 1000 700 High-speed mixer examined, the 85 5 730 same tribasic 85

The effect of different amounts of coating and the effectiveness of alcohols became more varied Chain length and structure using a basic holding component as in the preceding Examples were used. The compositions and melt viscosities at 125 ° C are in in Table III below.

Table III composition Tribasic paraffin wax Lead sulfate

(V.) C / o)

additive Melt viscosity at 125 ° C, Brookfield at 20 rpm

(Poise)

90 7.5 2.5% stearyl alcohol 95 75 20th 5% stearyl alcohol 8th 75 25th - 270 80 13th 7% n-octyl alcohol 80 80 15th 5% n-octyl alcohol 75 80 15th 5% 2-ethylhexyl alcohol 100 35 14th 1% n-lauryl alcohol 85 85 10 5% n-lauryl alcohol 40 85 7.5 7.5% n-lauryl alcohol 90 85 12.5 2.5% montanyl alcohol 110 85 10 5% oleyl alcohol 30th Example 4

A / iVdV L / aiVU ifVlKvU) VAOAtF ISVrJI V * Al »» »+« J * »JW« -i% 'lAi Uiviuhuh »

a coating amount as low as 10%, consisting of 7.5% paraffin wax and 2.5% stearyl alcohol, gives a melt viscosity which is about Vs that with 25% paraffin coating with no added alcohol is obtained.

Table IV

To show the different types of wax that can be used and the pigment substrates to be coated, below are viscosity values for a number of wax / stearyl alcohol coatings which refer to various Substrates were applied, indicated.

Pigment substrate

wax

Stearyl alcohol

Viscosity at 125 ° C (poise)

85% tribasic lead sulfate 85% tribasic lead sulfate 85% tribasic lead sulfate

85% tribasic lead sulphate 85% tribasic lead sulphate 80% basic lead chlorosilicate *) 80% basic lead chlorosilicate 80% basic lead chlorosilicate

80% basic lead chlorosilicate

85% basic lead chlorosilicate 85% basic lead chlorosilicate 80% basic lead chlorosilicate 80% white lead **) 80% medium chrome yellow ***) 80% b 50% b 50% b 85% c 65% c 65% c 55% c 55% c 75% c 75% c

Remarks:

*) Basic lead chlorosilicate: 48% PbO, 3% Cl and 49% SiO ₁ . **) White lead: basic lead carbonate. ,,. ".".

·· *) Medium chrome yellow: lead chromate with a lead chromate content of at least 95% . a = high molecular weight fatty acid ketones: main component stearic acid ketone. b = antimony silicone oxide (Oncor 23 A). c = rutile titanium dioxide (Titanox RA-50). d = 70% chlorinated paraffin (chlorine wax 70).

15% a no > 20000 12.5% a 2.5% 120 5% spermacet wax 5% 95 5% paraffin wax 15% ethylene distearamide no > 20,000 7.5% ethylene distearamide 7.5% 300 20% ethylene diricinolamide no 200 15% ethylene diricinolamide 5% 95 10% \ ethylene distearamide, no > 20,000 10% ethylene diricinolamide 7.5% ethylene distearamide 5% 170 7.5% ethylene diricinolamide 15% spermacet wax no > 20000 12.5% spermacet wax 2.5% 110 15% paraffin 5% 20th 15% paraffin 5% 150 15% paraffin 5% 50 15% paraffin 5% 15th 50% d no > 20,000 40% d 10% 80 20% paraffin 5% 210 35% paraffin no > 20000 30% paraffin 5% 50 45% paraffin no > 20,000 40% paraffin 5% 10 25% a no > 20000 20% a 5% 300

y 10

Example 5 The plastic components were in a 1-line

'"' ^IT ' - ~:" «i, t ..« rl HloMicrhiintT was

was mixed for 1 minute, and then 6 g were over- wedged, the samples from the roller in the form of 1.5 mm

zoeenes tribasic lead sulfate with a coating of strong foils.

of 75% Pa affin wax and 7.5% stearyl alcohol The roller-processed foils were η 76 > 152

ÄÄ the removal after an Oe- J _{ÄSS =} £: Ä

"" SSVerfahret ^ was wSderholt except composition side by side on a tribasic on that ^ g not plated lead sulfate Toggle 177 ⁰ C preheated 152 χ 152 x 1 '™ ^ ° ™ £ Se were used of the coated product. and at that temperature in a 10 M> groove part of the two dry mixes were compression molded alongside-cycle. The cycle consisted of placing each other on a steel plate and covered with one of the patterns in the ^ press during ι mm., An ^ ung second steel plate. Both plates were preheated to 177 ° C. for 1 minute from a pressure of 422 kg / cm 2. The dry mix samples maintained pressure for 3 mm. and anenthaltende disk unit was then brought to a Kunststofformpresse between vaporous closing cooling to 27 ° C in a 5 minutes Heated plates, cooling cycle were still under pressure, and in a 4-minute cycle at 177 ⁰ C a ₅ showed Examination of the pressed films Shaped foils. The foils were removed and there were clear differences in the color stability in the case of acu cools. The composition that the two compositions according to the invention. The composition containing coated tribasic lead sulfate was light-colored with the coated tribasic lead sulfate was pale yellow whereas the composition containing the yellow-uncoated tribasic lead sulfate was yellow-uncoated tribasic lead sulfate and separately brown while the sample composition contained the uncoated tribasic lead sulfate. The advantageous heat-stabilizing we-contained added wax / alcohol additives, enhancement of the former is thus evident. was brown. .

These data show that the coated tribasic The comparative form tests were carried out with the ex-

Lead sulfate in technical PVC dry mixes, took repeatedly that the heating period under which the type produced in high-speed mixers of the Henschel ^{type was extended to 15 min. At 177 °} C., creates improved stability. followed by 5 min. cooling (total cycle 20 mm.). The coating on the stabilizer melts during the prolonged heating, in turn, the prior mixing process due to the frictional heat, the partial heat stability of the composition with that in the plastic composition during the coated stabilizer became evident. She was developing yellow high-speed mixing. Accordingly, the stabilizer is well dispersed and the lead sulfate-stabilized control pattern darkly protects the resin during mixing, while that with the uncoated tn base. It had continued to turn yellowish brown.

the well-dispersed stabilizer protects the PVC resin foils were produced for impact resistance tests,

during the initial stages when the dry to show that in addition to the color differences

Mixing in an extruder or an injection molding press 45 also differences in the mechanical properties

is charged. In contrast, with the less will exist. 152 152 χ 1.3 mm specimens of each

well dispersed, uncoated stabilizer of the roll processed composition were "

Optimal protection is only achieved when one joins an electrically heated press at 196 ° C in one

later stage the shear stress of the extruder 10-minute cycle, the 5 min. heating and 5 min

screw and which included uncoated 50 cooling under pressure, compression molded.

Stabilizer is more dispersed. Using a Gardner Variable Heign

_n . . ,, Impact Tester Model 1410 using a

Example G piston with a tip of 12.7 mm diameter

The following tests were carried out in order to determine the impact strength

partial stability of the coated stabilizers to 55 The composition with the coated tn

demonstrate and show that similar effects basic lead sulfate possessed an impact strength vo

not by adding the coating components separately - 1.62 mkg, compared with 1.47 mkg for the control

ten to the plastic mixture can be achieved. composition not coated tribasic

Two vinyl plastic compositions consisting of containing lead sulfate.

made of 485 g of polyvinyl chloride resin (Geon 103 EP), 15 g of 60 These test data clearly show the advantages of the uei Acrylic processing aid iAcryloidK-lZO ^ and pulled stabilizer. It is obvious that " 5 grams of calcium stearate lubricant was prepared to separately add the coating additives to the plastic of a composition, 29.4 g of tribasic composition of matter were no equivalent properties Lead sulphate with a coating of 12.5% spermacets creates, given wax and 2.5% stearyl alcohol. The other 65

Composition contained 25.0 g of uncoated sample /

tribasic lead sulfate, 3.67 g of Spcrmacetwax and the following tests were carried out to determine the Vo

0.73 g of stearyl alcohol. parts of the invention related to overcoming d

Demonstrate dispersion and attrition problems encountered with rutile-type titanium dioxide pigments. A hard polyvinyl chloride composition consisting of 2000 g polyvinyl chloride resin (Geon 103 EP), 60 g organothiotin stabilizer (Thermolite 31), 20 g calcium stearate lubricant, 53.4 g paraffin wax and 13.2 g stearyl alcohol was added to the mixing chamber of a Henschel laboratory -Mixer brought. The mixing chamber had previously been heated ^{to 100 °} C. by circulating hot oil through the outer jacket. The dry mixture was mixed at a motor speed of 3800 rpm until the composition reached a temperature of HO ⁰ C after 7 minutes. At this temperature, 200 g of rutile titanium dioxide (Titanox RA-40) was introduced and mixing was continued. Mixing was momentarily stopped at 1 minute intervals to take small samples for later examination. Mixing was continued for a total of 20 minutes after the addition of the titanium dioxide pigment.

This procedure was then repeated with the exception that the paraffin wax and Stearylalkoholüberzugszusätze were omitted from the original feed to the mixer, and after the batch temperature reached 110 ⁰ C were 266.6 g of coated titanium dioxide, consisting of 75% Rutiltitandioxyd (Titanox RA 50), 20% paraffin wax and 5% stearyl alcohol are added. As in the previous test, samples were taken periodically during the 20 minute period that followed the addition of the titanium dioxide in the Henschel mixer.

To compare the plastic colors of the two test compositions, in a 4 minute compression molding cycle, as described in Betspiel 5, thin foils are formed. Parts of each test composition were installed next to each other after equivalent mixing times during the manufacture of these molded products, and the color differences at the interface enabled critical color comparisons. The visual Examination of these molded products showed that after 4 minutes of mixing, the test composition with the uncoated titanium dioxide was very distinctly gray compared to the composition which contained the coated pigment and had been mixed for the same amount of time. With increasing mixing times the color differences became even more pronounced. To get some quantitative data on the relative To obtain graying of the two compositions, light reflectance values of the molded Slides on a reflectometer (Gardner Laboratory Hunter Multipurpose) using the blue filter measured. The results are given below.

These data clearly demonstrate that the coating of the present invention eliminates metal abrasion from the processing equipment noticeably reduced by titanium dioxide pigments, resulting in a longer service life of the device and a markedly reduced amount introduced into the plastic composition Gray coloring results. Furthermore, these data show that similar properties are not separated by separate Introduction of the coating components in the ίο plastic composition can be achieved.

Example 8

To investigate the effect, the differences in metal contamination on the heat stability Exercise, the compositions of Example 7, the 20 min. After the addition of the titanium dioxide had been mixed, subjected to high temperature and shear stress influences. For this Investigations were carried out using a torsion rheometer (C. W.

ao Brabender Corp.), which was provided with a mixing chamber, was used. The test was carried out at a temperature of 200 ^° C. and a shear rate of 33 rpm. The color changes were followed by taking small samples in 5-minute

s5 intervals were taken. The theological Changes in the polymer, in particular the crosslinking, are from the mixed torsion data to visible at the time of massive polymer impairment.

The results are shown below. The use of coated titanium dioxide revealed a significant improvement in the thermal stability of the plastic composition, since it is the during metal contamination introduced by mixing.

Table V Reflotion blue filter coated TiO, Duration not coated of mixing TiO ₁ (Vo) the ΤίΟ, addition (Vo) 79.5 (Minutes) 77.0 79.1 4th 76.5 78.1 8th 75.7 78.0 10 73.8 77.2 15th 73.0 90

Table VI 40 Torsion when mixing in Titanium dioxide overdrawn 45 meter grams 5 minutes 10 mins in the composition 15 minutes not 1940 20 minutes overdrawn 2260 ⁵⁰ 25 minutes 2150 30 minutes 2140 35 minutes 1900, 2050 40 minutes 2240 1925 45 minutes 2140 1850 ⁵⁵ 50 minutes 2140 1950 Start of networking in 2050 2600 Minutes 1925 3450 Color changes in min. 1950 42.0 ⁶⁰ Minor change 2675 Light gray . 4250 Dark gray - 5 to 35 37.5 40 45 5 to 30 35 40

Example 9

A comparison of the properties of coated and uncoated rutile titanium dioxide i chlorosulfonated polyethylene rubber (Hypalora 4C

13 14

carried out. 500 g of polyethylene rubber were added to the dioxide pigment. Grinding was 6 min.

treated a heated to 149 ⁰ C two-roller mill. continued, again at 1-minute intervals

The batch was mixed for 5 minutes in the mill, and the samples were taken

The test specimens from the two compositions were then added to the rotating rubber base

13.33 g of coated rutile titanium dioxide pigment (Titanox 5 were then placed side by side in 1 mm thick foils

RA-50), which has a coating of 20% paraffin and 5% at 149 ⁰ C using a cycle of 5 minutes

Containing stearyl alcohol, given. Milling was followed by heating and cooling under pressure for 5 minutes

Continued for 6 min., After the addition of the over-molded. Using a reflectometer

Titanium dioxide drawn at intervals of each (Hunter Multipurpose) with a blue filter were

1 min. Samples were taken. io values of the molded films were obtained.

The procedure was repeated with the exception that the values given in Table VII confirm

that after 3 minutes of grinding the polyethylene what was observed during the grinding process,

rubber 2.665 g paraffin wax and 0.665 g stearyl- The coated titanium dioxide yields in the early

alcohol was added. Better color development after 2 minutes of processing

and mixing left 10 g of uncoated titanium-15 and holds color better with prolonged milling.

Table VII

TiO ₈ Reflection, , Blue filter (»/") 4th 5 6th Minutes ι after the addition of TiO, 71.4 71.2 68.5 Example 10 1 2 3 76.0 74.8 73.6 Not coated 75.8 75.0 72.8 easy evident. After about 1 min. Coated TiO _s 75.5 78.5 76.5 Roller mixer

One uncoated additive and one uncoated additive took about 2.5 minutes to

coated antimony silicooxide additive to the flame to be evenly dispersed. If there is no

Delay (Oncor 23A) in a high-density poly 3 ° composition was during the 28 minute

Ethylenhare that with a 70% chlorinated paraf- mill due to thermal impairment or

fin was modified, an investigation was carried out. Metal contamination a discernible discoloration

308 g high-density polyethylene (Marlex 6009), 40 g to be delivered.

70% chlorinated paraffin, 4 g zinc stearate and 2 g die after adding the antimony silicooxide in Calcium stearate was hand mixed and the test swatches removed from Mi- 35 2.5 minute intervals Mixing was carried out in a two-roll mill heated to 143 ° C. and then compression-molding stability roll mills at 163 and 177 ° C. liquefied and mixed. Mixing subject to investigation. Rehearsals everyone got together Continued for 8 minutes, and then 50 g of settling became secondary coated after the same grinding AntiiKonsilicooxyd additive applying one to the other in a 0.5mm mold Coating of 15% paraffin and 5% stearyl alcohol 40 of a 9 minute cycle consisting of 4 minutes of heating contained, admitted. Milling was continued for 20 min. And cooling under pressure for 5 min. being pressed for 15 minutes at intervals.

of 2.5 min. and then after the remaining 5 min.

Samples were taken. mingling times from pale yellow to yellow

The procedure was repeated with the exception of 45 dark tan. After the same heat exposure

that 7.5 g of paraffin and 2.5 g of stearyl alcohol in the showed the composition with the coated

original mixture and 40 g not over- addition significantly less discoloration than the total

Extracted antimony silicooxide additive after 8 minutes of exposure to the uncoated pigment. This is

Mills were added. from the Hunter reflectometer obtained and

The easier wetting and dispersion of the supernatant data given in Table VIII is easy

The added addition was evident in the early stage of the.

Table VIII

Reflection, blue filter (° / ₀ )
Grinding after adding TiOi (min.) 2.5 5.0 7.5 10.0 1 ^ 5 15fi 20.0

Fonngepreßt at 163 ⁰ C

Uncoated antimony silica Coated antimony silica

Fonngepreßt at 177 ⁰ C

Uncoated antimony silica Coated antimony silica

60.2 61.5 58.6 55.6 49.2 51.5 51.2 60.3 60.8 59.6 60.3 55.2 56.8 56.0 53.0 49.8 48.6 42.7 - - - 56.3 57.6 56.5 49.6 _

Claims (5)

In the case of old solid particle additives, namely, the di-patent claims: permeability is a problem, since the additives must be evenly distributed in the elastomer or resin, 1. With a waxy coating to exert their maximum effect. In addition to the large amount of solid particles added for polymers, the difficulty of dispersion is due to the lack of wettability of the solid particle substrates due to a coating. Basis of a wax which has a melting point This problem occurs in particular when in the between 50 and 150 ⁰ C, and a fatty polymer composition no liquids alcohol with 8 to 28 carbon atoms are present in one. Other effects such as electrostatic amount of 5 to 50% related to the coating. io properties of the additives can also be 2. Additive according to claim 1, characterized. draws that the solid particle substrate is dehydrated. It has now been found that a mixture of sated tribasic lead sulfate, titanium dioxide or a 5 to 50%, based on the coating, of at least Antimony oxide pigment is a fatty alcohol with 8 to 28 carbon atoms 3. Additive according to one of claims 1 and 2, 15 and a natural or synthetic wax, which is characterized in that the wax Spermacet- has a melting point between 50 and 150 ⁰ C, wax, ethylene distearamide, paraffin wax or a superior coating for solid particle additives, is halogenated wax. as is the case with resins, elastomers and plastics 4. Additive according to one of claims 1 to 3, are used, results. characterized in that the fatty alcohol ao The invention relates to one with a wax-containing Is stearyl or lauryl alcohol. Coated solid particle additive for polymer 5. A process for the production of coated solids, characterized by a coating on the particle additives according to claims 1 to 4, based on a wax which has a melting point between, characterized in that one has a solid particle 50 and 150 ⁰ C, and a fatty alcohol with a substrate with a wax which has a melting point of 8 to 28 carbon atoms in an amount of 5 to between 50 and 150 ^° C., and 5 to 50%, based on the coating. 50% of a fatty alcohol with 8 to 28 carbon although it was from the Canadian patent atoms treated by heating and / or mixing 5 52 250 known fillers for plastics with a delt, and that the coated substrate should be provided with a coating made of a paraffin wax if pulverized. 30 and resin or fatty acid esters. In contrast Was it surprising that solid particulate additives did that according to the invention at least 5% of a fatty alcohol with 8 to 28 carbon atoms, strongly